The resistance will change with heat thus the 10 - 14 ohm acceptable range but one or more might be out of range? Also when you installed them did you do an off the engine pressure check for leaks at the tips as well as at the O rings on the fuel rail? I did this test when I replaced my injectors to new type and found one leaking at the tip and these were OEM parts, exchanged for another.
You state that they are wholesale injectors does that mean not new or just cheaper or ....?